Convert "Top 'access denied' errors.", "Top 'page not found' errors" and Top search phrases to views

Problem/Motivation

The listings:

• Top 'access denied' errors.
• Top 'page not found' errors.
• Top search phrases.

Provided by dblog are using some database specific logic to return information. I'm not even sure how much this pages are being used by Drupal users anyway.

I would like to propose to replace those lists by views only versions and delete the dblog specific code from the module. Doing this reduced dblog complexity and helps to simplify #2458191: Provide a storage backend for dblog module → .

Proposed resolution

• Replace Top access denied errors, Top page not found and Top search phrases with a view.
• Delete the code relevant to this functionality from dblog.
• If the deletion is not possible due backward compatibility polices, at least deprecate those mothods from the module.

Remaining tasks

• Discuss if this is a valid request.
• Make a patch.

User interface changes

None if the views module is enabled. The user interface provided by views is identical to the created by dblog.

API changes

Deprecation or deletion of DbLogController::topLogMessages().

Data model changes